Prewire · case file · public copy of the record
FILE P342 PREWIRE receipts archive the live wire
CATCH #1342 DETECTED SEP 13, 2026 19:14 UTC
THE CATCHscore 9/10
EXHIBIT 1342 · FLASH
Sep 13, 2026 19:14 UTC lmarena lmarena.ai/leaderboard
A new anonymous model, 'muse-spark-1-3-max-bhma-text', appeared on the LMArena leaderboard, suggesting a stealth release or test.

READY TO POST:

looks like lmarena added a new, unannounced model 'muse-spark-1-3-max-bhma-text' to their leaderboard. could be a stealth test!

a new anonymous model just popped up on lmarena, codenamed 'muse-spark-1-3-max-bhma-text'. always interesting to see what's being tested quietly.

EVIDENCE — the receipts
LMArena: 1 new model appeared on the leaderboard
(labs test unreleased models here — often weeks before launch)

[anonymous codenames — likely stealth] (1)
  + muse-spark-1-3-max-bhma-text

caught by the 20-minute sweep · the live wire · all receipts

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